word_POSIX.txt (5967B)
1 # 2 # Copyright (C) 2016 and later: Unicode, Inc. and others. 3 # License & terms of use: http://www.unicode.org/copyright.html 4 # Copyright (C) 2002-2016, International Business Machines Corporation 5 # and others. All Rights Reserved. 6 # 7 # file: word_POSIX.txt 8 # 9 # ICU Word Break Rules, POSIX locale. 10 # See Unicode Standard Annex #29. 11 # These rules are based on UAX #29 Revision 34 for Unicode Version 12.0 12 # 13 # Note: Updates to word.txt will usually need to be merged into 14 # word_POSIX.txt also. 15 16 ############################################################################## 17 # 18 # Character class definitions from TR 29 19 # 20 ############################################################################## 21 22 !!chain; 23 !!quoted_literals_only; 24 25 26 # 27 # Character Class Definitions. 28 # 29 30 $Han = [:Han:]; 31 32 $CR = [\p{Word_Break = CR}]; 33 $LF = [\p{Word_Break = LF}]; 34 $Newline = [\p{Word_Break = Newline}]; 35 $Extend = [\p{Word_Break = Extend}-$Han]; 36 $ZWJ = [\p{Word_Break = ZWJ}]; 37 $Regional_Indicator = [\p{Word_Break = Regional_Indicator}]; 38 $Format = [\p{Word_Break = Format}]; 39 $Katakana = [\p{Word_Break = Katakana}]; 40 $Hebrew_Letter = [\p{Word_Break = Hebrew_Letter}]; 41 $ALetter = [\p{Word_Break = ALetter}]; 42 $Single_Quote = [\p{Word_Break = Single_Quote}]; 43 $Double_Quote = [\p{Word_Break = Double_Quote}]; 44 $MidNumLet = [\p{Word_Break = MidNumLet} - [.]]; 45 $MidLetter = [\p{Word_Break = MidLetter} - [\:]]; 46 $MidNum = [\p{Word_Break = MidNum} [.]]; 47 $Numeric = [\p{Word_Break = Numeric}]; 48 $ExtendNumLet = [\p{Word_Break = ExtendNumLet}]; 49 $WSegSpace = [\p{Word_Break = WSegSpace}]; 50 $Extended_Pict = [\p{Extended_Pictographic}]; 51 52 $Hiragana = [:Hiragana:]; 53 $Ideographic = [\p{Ideographic}]; 54 55 56 # Dictionary character set, for triggering language-based break engines. Currently 57 # limited to LineBreak=Complex_Context. Note that this set only works in Unicode 58 # 5.0 or later as the definition of Complex_Context was corrected to include all 59 # characters requiring dictionary break. 60 61 $Control = [\p{Grapheme_Cluster_Break = Control}]; 62 $HangulSyllable = [\uac00-\ud7a3]; 63 $ComplexContext = [:LineBreak = Complex_Context:]; 64 $KanaKanji = [$Han $Hiragana $Katakana]; 65 $dictionaryCJK = [$KanaKanji $HangulSyllable]; 66 $dictionary = [$ComplexContext $dictionaryCJK]; 67 68 # TODO: check if handling of katakana in dictionary makes rules incorrect/void 69 70 # leave CJK scripts out of ALetterPlus 71 $ALetterPlus = [$ALetter-$dictionaryCJK [$ComplexContext-$Extend-$Control]]; 72 73 74 ## ------------------------------------------------- 75 76 # Rule 3 - CR x LF 77 # 78 $CR $LF; 79 80 # Rule 3c Do not break within emoji zwj sequences. 81 # ZWJ × \p{Extended_Pictographic}. Precedes WB4, so no intervening Extend chars allowed. 82 # 83 $ZWJ $Extended_Pict; 84 85 # Rule 3d - Keep horizontal whitespace together. 86 # 87 $WSegSpace $WSegSpace; 88 89 # Rule 4 - ignore Format and Extend characters, except when they appear at the beginning 90 # of a region of Text. 91 92 $ExFm = [$Extend $Format $ZWJ]; 93 94 ^$ExFm+; # This rule fires only when there are format or extend characters at the 95 # start of text, or immediately following another boundary. It groups them, in 96 # the event there are more than one. 97 98 [^$CR $LF $Newline $ExFm] $ExFm*; # This rule rule attaches trailing format/extends to words, 99 # with no special rule status value. 100 101 $Numeric $ExFm* {100}; # This group of rules also attach trailing format/extends, but 102 $ALetterPlus $ExFm* {200}; # with rule status set based on the word's final base character. 103 $HangulSyllable {200}; 104 $Hebrew_Letter $ExFm* {200}; 105 $Katakana $ExFm* {400}; # note: these status values override those from rule 5 106 $Hiragana $ExFm* {400}; # by virtue of being numerically larger. 107 $Ideographic $ExFm* {400}; # 108 109 # 110 # rule 5 111 # Do not break between most letters. 112 # 113 ($ALetterPlus | $Hebrew_Letter) $ExFm* ($ALetterPlus | $Hebrew_Letter); 114 115 # rule 6 and 7 116 ($ALetterPlus | $Hebrew_Letter) $ExFm* ($MidLetter | $MidNumLet | $Single_Quote) $ExFm* ($ALetterPlus | $Hebrew_Letter) {200}; 117 118 # rule 7a 119 $Hebrew_Letter $ExFm* $Single_Quote {200}; 120 121 # rule 7b and 7c 122 $Hebrew_Letter $ExFm* $Double_Quote $ExFm* $Hebrew_Letter; 123 124 # rule 8 125 126 $Numeric $ExFm* $Numeric; 127 128 # rule 9 129 130 ($ALetterPlus | $Hebrew_Letter) $ExFm* $Numeric; 131 132 # rule 10 133 134 $Numeric $ExFm* ($ALetterPlus | $Hebrew_Letter); 135 136 # rule 11 and 12 137 138 $Numeric $ExFm* ($MidNum | $MidNumLet | $Single_Quote) $ExFm* $Numeric; 139 140 # rule 13 141 # to be consistent with $KanaKanji $KanaKanhi, changed 142 # from 300 to 400. 143 # See also TestRuleStatus in intltest/rbbiapts.cpp 144 $Katakana $ExFm* $Katakana {400}; 145 146 # rule 13a/b 147 148 $ALetterPlus $ExFm* $ExtendNumLet {200}; # (13a) 149 $Hebrew_Letter $ExFm* $ExtendNumLet {200}; # (13a) 150 $Numeric $ExFm* $ExtendNumLet {100}; # (13a) 151 $Katakana $ExFm* $ExtendNumLet {400}; # (13a) 152 $ExtendNumLet $ExFm* $ExtendNumLet {200}; # (13a) 153 154 $ExtendNumLet $ExFm* $ALetterPlus {200}; # (13b) 155 $ExtendNumLet $ExFm* $Hebrew_Letter {200}; # (13b) 156 $ExtendNumLet $ExFm* $Numeric {100}; # (13b) 157 $ExtendNumLet $ExFm* $Katakana {400}; # (13b) 158 159 # rules 15 - 17 160 # Pairs of Regional Indicators stay together. 161 # With incoming rule chaining disabled by ^, this rule will match exactly two of them. 162 # No other rule begins with a Regional_Indicator, so chaining cannot extend the match. 163 # 164 ^$Regional_Indicator $ExFm* $Regional_Indicator; 165 166 # special handling for CJK characters: chain for later dictionary segmentation 167 $HangulSyllable $HangulSyllable {200}; 168 $KanaKanji $KanaKanji {400}; # different rule status if both kana and kanji found 169 170 # Rule 999 171 # Match a single code point if no other rule applies. 172 .;